264340251031666 has 4 divisors (see below), whose sum is σ = 396510376547502. Its totient is φ = 132170125515832.

The previous prime is 264340251031627. The next prime is 264340251031667. The reversal of 264340251031666 is 666130152043462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 216380540194641 + 47959710837025 = 14709879^2 + 6925295^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (264340251031667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66085062757915 + ... + 66085062757918.

Almost surely, 2^{264340251031666} is an apocalyptic number.

264340251031666 is a deficient number, since it is larger than the sum of its proper divisors (132170125515836).

264340251031666 is a wasteful number, since it uses less digits than its factorization.

264340251031666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132170125515835.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 264340251031666 in words is "two hundred sixty-four trillion, three hundred forty billion, two hundred fifty-one million, thirty-one thousand, six hundred sixty-six".